House Oversight Committee Chairman James Comer (R-KY) sent letters Johnson and the mayors for three other major cities – Boston, Denver, and New York – last week, asking them to testify before the committee and hand over all documents and communications related to their city's sanctuary policies.

Mayor Brandon Johnson will testify before lawmakers on Capitol Hill next month as part of an investigation into U.S. sanctuary cities. House Committee on Oversight and Government Reform Chairman

Johnson and three other big-city mayors, all Democrats, will attend the March 5 hearing of the House Oversight and Government Reform Committee, which is investigating how local policies affect enforcement of President Donald Trump’s promise of mass deportations.